149 lines
4.9 KiB
C
149 lines
4.9 KiB
C
/* $NetBSD: ate_subr.c,v 1.3 2002/09/28 18:19:08 tsutsui Exp $ */
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/*
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* All Rights Reserved, Copyright (C) Fujitsu Limited 1995
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*
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* This software may be used, modified, copied, distributed, and sold, in
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* both source and binary form provided that the above copyright, these
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* terms and the following disclaimer are retained. The name of the author
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* and/or the contributor may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND THE CONTRIBUTOR ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR THE CONTRIBUTOR BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION.
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Portions copyright (C) 1993, David Greenman. This software may be used,
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* modified, copied, distributed, and sold, in both source and binary form
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* provided that the above copyright and these terms are retained. Under no
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* circumstances is the author responsible for the proper functioning of this
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* software, nor does the author assume any responsibility for damages
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* incurred with its use.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ate_subr.c,v 1.3 2002/09/28 18:19:08 tsutsui Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/socket.h>
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#include <sys/syslog.h>
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <dev/ic/mb86960reg.h>
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#include <dev/ic/ate_subr.h>
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static __inline__ void ate_strobe __P((bus_space_tag_t, bus_space_handle_t));
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/*
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* Routines to read all bytes from the config EEPROM through MB86965A.
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* I'm not sure what exactly I'm doing here... I was told just to follow
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* the steps, and it worked. Could someone tell me why the following
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* code works? (Or, why all similar codes I tried previously doesn't
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* work.) FIXME.
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*/
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static __inline__ void
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ate_strobe (iot, ioh)
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bus_space_tag_t iot;
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bus_space_handle_t ioh;
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{
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/*
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* Output same value twice. To speed-down execution?
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*/
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bus_space_write_1(iot, ioh, FE_BMPR16, FE_B16_SELECT);
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bus_space_write_1(iot, ioh, FE_BMPR16, FE_B16_SELECT);
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bus_space_write_1(iot, ioh, FE_BMPR16, FE_B16_SELECT | FE_B16_CLOCK);
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bus_space_write_1(iot, ioh, FE_BMPR16, FE_B16_SELECT | FE_B16_CLOCK);
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bus_space_write_1(iot, ioh, FE_BMPR16, FE_B16_SELECT);
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bus_space_write_1(iot, ioh, FE_BMPR16, FE_B16_SELECT);
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}
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void
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ate_read_eeprom(iot, ioh, data)
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bus_space_tag_t iot;
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bus_space_handle_t ioh;
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u_char *data;
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{
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int n, count;
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u_char val, bit;
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/* Read bytes from EEPROM; two bytes per an iteration. */
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for (n = 0; n < FE_EEPROM_SIZE / 2; n++) {
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/* Reset the EEPROM interface. */
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bus_space_write_1(iot, ioh, FE_BMPR16, 0x00);
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bus_space_write_1(iot, ioh, FE_BMPR17, 0x00);
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bus_space_write_1(iot, ioh, FE_BMPR16, FE_B16_SELECT);
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/* Start EEPROM access. */
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bus_space_write_1(iot, ioh, FE_BMPR17, FE_B17_DATA);
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ate_strobe(iot, ioh);
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/* Pass the iteration count to the chip. */
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count = 0x80 | n;
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for (bit = 0x80; bit != 0x00; bit >>= 1) {
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bus_space_write_1(iot, ioh, FE_BMPR17,
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(count & bit) ? FE_B17_DATA : 0);
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ate_strobe(iot, ioh);
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}
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bus_space_write_1(iot, ioh, FE_BMPR17, 0x00);
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/* Read a byte. */
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val = 0;
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for (bit = 0x80; bit != 0x00; bit >>= 1) {
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ate_strobe(iot, ioh);
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if (bus_space_read_1(iot, ioh, FE_BMPR17) &
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FE_B17_DATA)
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val |= bit;
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}
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*data++ = val;
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/* Read one more byte. */
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val = 0;
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for (bit = 0x80; bit != 0x00; bit >>= 1) {
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ate_strobe(iot, ioh);
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if (bus_space_read_1(iot, ioh, FE_BMPR17) &
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FE_B17_DATA)
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val |= bit;
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}
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*data++ = val;
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}
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/* Make sure the EEPROM is turned off. */
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bus_space_write_1(iot, ioh, FE_BMPR16, 0);
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bus_space_write_1(iot, ioh, FE_BMPR17, 0);
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#if ATE_DEBUG >= 3
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/* Report what we got. */
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data -= FE_EEPROM_SIZE;
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log(LOG_INFO, "ate_read_eeprom: EEPROM at %04x:"
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" %02x%02x%02x%02x %02x%02x%02x%02x -"
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" %02x%02x%02x%02x %02x%02x%02x%02x -"
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" %02x%02x%02x%02x %02x%02x%02x%02x -"
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" %02x%02x%02x%02x %02x%02x%02x%02x\n",
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(int) ioh, /* XXX */
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data[ 0], data[ 1], data[ 2], data[ 3],
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data[ 4], data[ 5], data[ 6], data[ 7],
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data[ 8], data[ 9], data[10], data[11],
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data[12], data[13], data[14], data[15],
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data[16], data[17], data[18], data[19],
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data[20], data[21], data[22], data[23],
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data[24], data[25], data[26], data[27],
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data[28], data[29], data[30], data[31]);
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#endif
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}
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